Three close friends for 5 years, Eun Seong, Hee Sook, and Soo Ji. Only Hee Sook has no relationship experience. One day, a man, Tae seong, appeared to Hee Sook. However, he was a brother of Eun Seong. Hee Sook worried about the friendship, so she started to hide that she kept in touch with Tae Seong. Meanwhile, SooJi and Chan hyuk have been together for a long time. SooJi got hurt from time to time because she thought she wasn't pretty enough compared to her boyfriend who is good-looking. One day, Soo ji saw Chan Hyuk being with a pretty female friend, and she decided to tell him how she felt.